Fix hover styles in strictmode docs (#6705)

Author: rickhanlonii

src/content/reference/react/StrictMode.md

@@ -196,14 +196,16 @@ ul {
   margin: 0;
   list-style-type: none;
   height: 100%;
+  display: flex;
+  flex-wrap: wrap;
+  padding: 10px;
 }
 
 li {
   border: 1px solid #aaa;
   border-radius: 6px;
   float: left;
   margin: 5px;
-  margin-bottom: 20px;
   padding: 5px;
   width: 70px;
   height: 100px;
@@ -283,14 +285,16 @@ ul {
   margin: 0;
   list-style-type: none;
   height: 100%;
+  display: flex;
+  flex-wrap: wrap;
+  padding: 10px;
 }
 
 li {
   border: 1px solid #aaa;
   border-radius: 6px;
   float: left;
   margin: 5px;
-  margin-bottom: 20px;
   padding: 5px;
   width: 70px;
   height: 100px;
@@ -377,14 +381,16 @@ ul {
   margin: 0;
   list-style-type: none;
   height: 100%;
+  display: flex;
+  flex-wrap: wrap;
+  padding: 10px;
 }
 
 li {
   border: 1px solid #aaa;
   border-radius: 6px;
   float: left;
   margin: 5px;
-  margin-bottom: 20px;
   padding: 5px;
   width: 70px;
   height: 100px;
@@ -467,14 +473,16 @@ ul {
   margin: 0;
   list-style-type: none;
   height: 100%;
+  display: flex;
+  flex-wrap: wrap;
+  padding: 10px;
 }
 
 li {
   border: 1px solid #aaa;
   border-radius: 6px;
   float: left;
   margin: 5px;
-  margin-bottom: 20px;
   padding: 5px;
   width: 70px;
   height: 100px;